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IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

$ ipcalc
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.0.252.0/22
network10.0.252.0/22
broadcast10.0.255.255
first host10.0.252.1
last host10.0.255.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.0.252.0/22
address00001010.00000000.11111100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000000.11111100.00000000
broadcast00001010.00000000.11111111.11111111
green = network part, grey = host part
hex0x0a00fc00
decimal167836672
reverse dns0.252.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:fc00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.252.0/2810.0.252.1 – 10.0.252.1410.0.252.15
210.0.252.16/2810.0.252.17 – 10.0.252.3010.0.252.31
310.0.252.32/2810.0.252.33 – 10.0.252.4610.0.252.47
410.0.252.48/2810.0.252.49 – 10.0.252.6210.0.252.63
510.0.252.64/2810.0.252.65 – 10.0.252.7810.0.252.79
610.0.252.80/2810.0.252.81 – 10.0.252.9410.0.252.95
710.0.252.96/2810.0.252.97 – 10.0.252.11010.0.252.111
810.0.252.112/2810.0.252.113 – 10.0.252.12610.0.252.127
910.0.252.128/2810.0.252.129 – 10.0.252.14210.0.252.143
1010.0.252.144/2810.0.252.145 – 10.0.252.15810.0.252.159
1110.0.252.160/2810.0.252.161 – 10.0.252.17410.0.252.175
1210.0.252.176/2810.0.252.177 – 10.0.252.19010.0.252.191
1310.0.252.192/2810.0.252.193 – 10.0.252.20610.0.252.207
1410.0.252.208/2810.0.252.209 – 10.0.252.22210.0.252.223
1510.0.252.224/2810.0.252.225 – 10.0.252.23810.0.252.239
1610.0.252.240/2810.0.252.241 – 10.0.252.25410.0.252.255
1710.0.253.0/2810.0.253.1 – 10.0.253.1410.0.253.15
1810.0.253.16/2810.0.253.17 – 10.0.253.3010.0.253.31
1910.0.253.32/2810.0.253.33 – 10.0.253.4610.0.253.47
2010.0.253.48/2810.0.253.49 – 10.0.253.6210.0.253.63
2110.0.253.64/2810.0.253.65 – 10.0.253.7810.0.253.79
2210.0.253.80/2810.0.253.81 – 10.0.253.9410.0.253.95
2310.0.253.96/2810.0.253.97 – 10.0.253.11010.0.253.111
2410.0.253.112/2810.0.253.113 – 10.0.253.12610.0.253.127
2510.0.253.128/2810.0.253.129 – 10.0.253.14210.0.253.143
2610.0.253.144/2810.0.253.145 – 10.0.253.15810.0.253.159
2710.0.253.160/2810.0.253.161 – 10.0.253.17410.0.253.175
2810.0.253.176/2810.0.253.177 – 10.0.253.19010.0.253.191
2910.0.253.192/2810.0.253.193 – 10.0.253.20610.0.253.207
3010.0.253.208/2810.0.253.209 – 10.0.253.22210.0.253.223
3110.0.253.224/2810.0.253.225 – 10.0.253.23810.0.253.239
3210.0.253.240/2810.0.253.241 – 10.0.253.25410.0.253.255
3310.0.254.0/2810.0.254.1 – 10.0.254.1410.0.254.15
3410.0.254.16/2810.0.254.17 – 10.0.254.3010.0.254.31
3510.0.254.32/2810.0.254.33 – 10.0.254.4610.0.254.47
3610.0.254.48/2810.0.254.49 – 10.0.254.6210.0.254.63
3710.0.254.64/2810.0.254.65 – 10.0.254.7810.0.254.79
3810.0.254.80/2810.0.254.81 – 10.0.254.9410.0.254.95
3910.0.254.96/2810.0.254.97 – 10.0.254.11010.0.254.111
4010.0.254.112/2810.0.254.113 – 10.0.254.12610.0.254.127
4110.0.254.128/2810.0.254.129 – 10.0.254.14210.0.254.143
4210.0.254.144/2810.0.254.145 – 10.0.254.15810.0.254.159
4310.0.254.160/2810.0.254.161 – 10.0.254.17410.0.254.175
4410.0.254.176/2810.0.254.177 – 10.0.254.19010.0.254.191
4510.0.254.192/2810.0.254.193 – 10.0.254.20610.0.254.207
4610.0.254.208/2810.0.254.209 – 10.0.254.22210.0.254.223
4710.0.254.224/2810.0.254.225 – 10.0.254.23810.0.254.239
4810.0.254.240/2810.0.254.241 – 10.0.254.25410.0.254.255
4910.0.255.0/2810.0.255.1 – 10.0.255.1410.0.255.15
5010.0.255.16/2810.0.255.17 – 10.0.255.3010.0.255.31
5110.0.255.32/2810.0.255.33 – 10.0.255.4610.0.255.47
5210.0.255.48/2810.0.255.49 – 10.0.255.6210.0.255.63
5310.0.255.64/2810.0.255.65 – 10.0.255.7810.0.255.79
5410.0.255.80/2810.0.255.81 – 10.0.255.9410.0.255.95
5510.0.255.96/2810.0.255.97 – 10.0.255.11010.0.255.111
5610.0.255.112/2810.0.255.113 – 10.0.255.12610.0.255.127
5710.0.255.128/2810.0.255.129 – 10.0.255.14210.0.255.143
5810.0.255.144/2810.0.255.145 – 10.0.255.15810.0.255.159
5910.0.255.160/2810.0.255.161 – 10.0.255.17410.0.255.175
6010.0.255.176/2810.0.255.177 – 10.0.255.19010.0.255.191
6110.0.255.192/2810.0.255.193 – 10.0.255.20610.0.255.207
6210.0.255.208/2810.0.255.209 – 10.0.255.22210.0.255.223
6310.0.255.224/2810.0.255.225 – 10.0.255.23810.0.255.239
6410.0.255.240/2810.0.255.241 – 10.0.255.25410.0.255.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /22
/00.0.0.04,294,967,2964,294,967,294-
/1128.0.0.02,147,483,6482,147,483,646-
/2192.0.0.01,073,741,8241,073,741,822-
/3224.0.0.0536,870,912536,870,910-
/4240.0.0.0268,435,456268,435,454-
/5248.0.0.0134,217,728134,217,726-
/6252.0.0.067,108,86467,108,862-
/7254.0.0.033,554,43233,554,430-
/8255.0.0.016,777,21616,777,214-
/9255.128.0.08,388,6088,388,606-
/10255.192.0.04,194,3044,194,302-
/11255.224.0.02,097,1522,097,150-
/12255.240.0.01,048,5761,048,574-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,0221
/23255.255.254.05125102 split →
/24255.255.255.02562544 split →
/25255.255.255.1281281268 split →
/26255.255.255.192646216 split →
/27255.255.255.224323032 split →
/28255.255.255.240161464 split →
/29255.255.255.24886128 split →
/30255.255.255.25242256 split →
/31255.255.255.25422512 split →
/32255.255.255.255111,024 split →
02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →